Ceramica Gazzini's PREMIUM ONIX marble-look porcelain tile is manufactured in Italy and available in both a matte (natural) and polished (lappato) finish. The PREMIUM ONYX tile collection comes in 24"x24", 12"x24", 12"x12", 4"x12", 2" hexagon mosaic, herringbone mosaic, muretto mosaic and intarsio mosaic.